My wife was driving our Acadia today and heard a vibration coming from the front of the car. She can't pinpoint it exactly but she said it seemed to come from the dashboard area. She left the car for a short time and she came back to find this small metal bracket on the driver's seat. We have no idea where it came from or if it had anything to do with the vibration. If anyone recognizes this, pleaes let me know! I will be contacting our dealer tomorrw, but this forum tends to have the best information out there.